15. After examining the chemical structures below, answer the subsequent questio
ID: 3164401 • Letter: 1
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15. After examining the chemical structures below, answer the subsequent questions Figure 4: ???? 081 ?? 01 The molecules in the figure 4 (A) are used to assembly which major macromolecule of the cell? (1pt) a. b. What type of reaction is taking place in figure 4? (1pt) c. What type of bond is created new in (B)? (1pt) d. What is the specific name for the bond created new in (8)? (1pt) 16. A scientist has just discovered a new previously unidentified virus. He believes that this vinus uses DNA as its genetic information (a DNA virus) and not RNA (an RNA virus). He then wanted to determine if this virus was a single stranded DNA (ssDNA) vinus on double stranded DNA (dsDNA) overall percentage of Adenine, Guanine, Thymine and Cytosine in the DN the following: 25% A, 33% T, 22% C, and 20% G Using these values, what inference can you make regarding the state of the virus's DNA? Explain. (2pts) a. ) virus. He therefore decides to do this by testing the Page 4 of 7, Lecture Exam, #3, BIOL 221Explanation / Answer
15. a. The macromolecule being assembles is the nucleic acid (can be DNA or RNA depending on the suagr and bases)
b. A condensation reaction is taking place in this figure.
c.In this reaction an ester bond is being formed between the hydroxyl group in the phosphate of one nucleotide and the alcohol group of the sugar moiety in the second nucleotide via condensation reaction.
d. The bond created is called phosphodiester bond.
16. A dsDNA follows Chargaff's rule and therefore has equal numbers of purine and egual numbers of pyrimidines. this means [A]=[T] and [G]=[C]. Snce in this case we see that the Chargaff's rule is not being satisfied therefore it can be concluded that it is a single stranded DNA.
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